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Keywords = Co–W barrier sublayer

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Article
An Effect of Co–W Barrier Sublayer on the Functional Characteristics of Au–Ru Contact Coatings
by Gennady P. Gololobov, Dmitriy V. Suvorov, Sergey M. Karabanov, Evgeniy V. Slivkin and Alexander Tolstoguzov
Coatings 2022, 12(2), 161; https://doi.org/10.3390/coatings12020161 - 27 Jan 2022
Cited by 1 | Viewed by 2249
Abstract
The performance characteristics (microhardness, porosity, roughness, and transient resistance) of Au–Ru coatings with and without the Co–W alloy barrier sublayer electrodeposited on the surface of contact blades of commercially produced reed switches were investigated. It was found that the barrier sublayer reduces the [...] Read more.
The performance characteristics (microhardness, porosity, roughness, and transient resistance) of Au–Ru coatings with and without the Co–W alloy barrier sublayer electrodeposited on the surface of contact blades of commercially produced reed switches were investigated. It was found that the barrier sublayer reduces the average roughness of the coatings without significant change in their porosity. The Au–Ru coatings without sublayer exhibited a greater variation in the transient resistance during an increase in the pressing force. The service time of reed switches with the barrier sublayer increased in both testing modes: in low-power (50 mV, 5 μA, 50 Hz) by more than 4 × 106 switching cycles, and in mean-power (12 V, 0.25 A, 50 Hz) by more than 1.8 × 106 switching cycles. Full article
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